Malicious PDF — malware analysis report

Static analysis result for SHA-256 947ef72b5a1e76ab…

MALICIOUS

PDF

74.9 KB Created: 2021-04-06 18:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1f52b7b0a1dd2f3f1cb31808d8d5cf77 SHA-1: 5046a62a65183a2fbf7cb370545b802fbefbd3b3 SHA-256: 947ef72b5a1e76abb6a36b7ef0426f0780fc65278f84691e0e4cb64ca7641cdd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/wix?keyword=bissell+cleanview+rewind+pet+2383+parts PDF link annotation
    • http://woberate.getenjoyment.net/adjusted_cash_book_and_bank_reconciliation_statement.pdfIn PDF document text
    • http://mastericy-chistoty.ru/negotiation_genius_downloads8vxp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_601d9b63c0d4d.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/91588110744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_60462b9804652.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/babylon._js_tutorial.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/the_cask_of_amontillado_free_download.pdfIn PDF document text
    • http://zubudiru.sportsontheweb.net/blank_page_notebook.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/57897654845.pdfIn PDF document text
    • http://cheatyou.site/how_to_write_a_math_lesson_plan_for_preschoolerscmmf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_5fd6800c8ef9f.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/gefakereti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_60249e17dcea9.pdfIn PDF document text
    • http://draiwenstore.online/20966338096swvlt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a45f01-4e57-4cd5-bd44-753265387e05/puzusanogoluvutoza.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_beaa0adbf10f4d589c6b3ee4f03d42f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d756fa8-0e86-4a45-abe6-565c8aa1e06b/espiritu_de_dios_chords_and_lyrics_para_guitarra.pdfIn PDF document text
    • http://pekamidakoj.atwebpages.com/century_powermate_70_mig_welder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8078d4be-9ad9-4b82-8a2f-f887889c2c82/si_me_sacan_la_muela_del_juicio_puedo_comer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b8ecfc-8111-4af7-b9dd-afc4da22fc84/how_do_i_get_my_ip_address_on_windows_10.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_8d62bf2bd3be451aab2450d84dd3178d.pdf?index=trueIn PDF document text
    • http://tiwatimab.atwebpages.com/how_do_whales_help_fight_climate_change.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_b8404ae7a1104b2fa9b75ea81c81e019.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_fea0c58eb7784a09aa9e361e1c79b58f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2dd16b5-1910-42ec-8fdd-72f1cb3168b8/microsoft_office_download_free_full_version_2016.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 5760 bytes
SHA-256: 48de7a9702988b0989e9f123293e32bbc3a74b9806e2d2605580357423c12753
font_01_sfnt_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 10048 bytes
SHA-256: b4b089524ec4e8985bf084e2dfe4f02c57728923d399b2fdaa4b76f1302d7d50